TEE memory corruption via malformed command arguments
Published Sep 5, 2025 · Updated Sep 8, 2025
Out-of-bounds write in AMD TEE allows local users with privileged userspace access to corrupt protected memory via malformed commands. The TEE command handler insufficiently checks argument bounds before accessing memory, so malformed arguments cause an out-of-bounds write. Administrator-level local access is required; successful exploitation compromises integrity or interrupts availability, with no reported disclosure impact.
Summary
What happened
Out-of-bounds write in AMD TEE allows local users with privileged userspace access to corrupt protected memory via malformed commands. The TEE command handler insufficiently checks argument bounds before accessing memory, so malformed arguments cause an out-of-bounds write. Administrator-level local access is required; successful exploitation compromises integrity or interrupts availability, with no reported disclosure impact.
The record
- CVE
- CVE-2021-26383
- Published
- Sep 5, 2025
- Updated
- Sep 8, 2025
- Vendor
- Advanced Micro Devices, Inc.
- Product
- AMD Instinct™ MI250
- Classifications
- CWE-787, T1499
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Sep 5, 2025CVE publishedPublication date reported by the CVE source.
- Sep 8, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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